New cellulosic titanium dioxide nanocomposite as a protective coating for preserving paper-art-works     

Maryam Afsharpour  Fereshteh T. Rad  Hamid Malekian 《Journal of Cultural Heritage》2011,12(4):380

We investigate the TiO₂ role in the inherent protection of paper works of art to protect them against damaging effect of ultraviolet radiation, pollutant gasses, mold and bacteria. In this study a cellulosic nanocomposite of TiO₂ were used as protective coating on the surface of paper fibers. This layered nanocomposite can act as a consolidate materials too. Furthermore, to determine how well paper works screen objects from the damaging effects, two accelerated aging mechanisms due to light and heat are discussed. Results show good stability of papers with nanocomposite coating. Also, a good light stability was shown in the colored paper that treated with this nanocomposite. Furthermore, to demonstrate the degree of antifungal properties of coated papers, papers were treated with two common molds and the good preventive effect of coated paper against molds is described.  相似文献   

TiNYT15涂层车刀刀具使用寿命实验研究     

沈延山  于靖华 《大连大学学报》1997,(2)

本文主要介绍了用阶梯切削法来建立YT15氮化钛涂层车刀的刀具使用寿命计算公式方法,并对涂层刀具和未涂层刀具的切削数据进行了处理和比较,进一步从理论上和实验上论证了涂层刀具的使用寿命远高于未涂层刀具的事实。  相似文献   

外墙保温对夏热冬冷地区住宅空调负荷的影响     

宁勇飞  刘泽华  陈刚 《怀化学院学报》2006,25(5):113-115

采用DeST软件,对夏热冬冷地区外墙保温的住宅进行了全年的能耗模拟,分析了不同外墙保温形式对住宅负荷的影响·  相似文献   

镍-磷-氧化铁纳米复合材料镀层的制备及其性能研究     

马美华  郑波  张凤 《南京晓庄学院学报》2005,21(5):37-40

采用复合化学镀方法制备了镍-磷-氧化铁纳米复合材料镀层。通过孔隙率、耐腐蚀性、硬度、耐磨性等性质试验,结果表明:纳米复合镀层致密性、耐腐蚀性和耐磨性等均优于A3钢片,甚至优于Ni-P镀层。  相似文献   

大体积混凝土污水处理工程的施工技术     

迟作进  杨宏延  刘介元 《辽宁科技学院学报》2003,5(3):34-36

为防止大体积砼产生裂缝，采用HE微膨胀剂与LNF泵送剂行之有效。同时应进行温度应力与浇筑长度验算和精心施工。  相似文献   

一种高压设备绝缘在线监测系统的数据采集装置     

黄俊杰  黄云峰  高金峰 《福建工程学院学报》2004,2(2):182-185

介绍一种结构简单、精度高、成本低的高压设备绝缘在线监测系统的数据采集装置的软硬件设计方法和原理。该装置使用简单可靠的硬件高速锁相环电路，控制6通道∑-△AD转换器实现同步整周期采样和跟踪滤波，实现对相互关联的6路信号进行同步数据采集和数据分析，并将设备绝缘状态传送到上位机，为上位机提供设备绝缘监测的原始分析数据。  相似文献   

Water-soluble UV curable urethane methyl acrylate coating: preparation and properties     

魏燕彦  罗英武  李宝芳  李伯耿 《Journal of Zhejiang University. Science. B》2004,(8)

INTRODUCTION During the last 20 years, UV coatings havegrown from their first applications in furniturecoatings to embrace many industries includingelectronics, printing and automotive. Because oftheir fast production rates, low temperature cureand volatile organic compound (VOC) reduction,UV curable coatings have achieved fast growth inthe coating market. However, in the conventionalUV-cured coating system, the reactive diluentsused to reduce the viscosity have strong odor,toxic…  相似文献   

Tribology Performance and Adhesive Strength Evaluation of TiAlSiN Coating     

姜峰  谢鸿  融亦鸣  言兰 《天津大学学报(英文版)》2011,17(4):248-253

Scratch test and friction test were performed to evaluate the internal and external interface behaviors of TiAlSiN coating, respectively. The critical compressive and shearing stress of coating failure during scratch test were calculated and the values are 30.84 MPa and 4.98 MPa respectively. The average friction coefficients of TiAlSiN coating against 2Cr12Ni4Mo3VNbN steel are 0.70 (sliding speed 50 m/min), 0.63 (sliding speed 100 m/min), and 0.81 (sliding speed 150 m/min). The elements diffusion was analyzed by EDS. Al and Si element of coating material diffuse to the steel disc, except Ti element. The oxidation decreases with the increase of sliding speed, but the adhesion increases with the increase of sliding speed. More Al element diffuses to the steel disc at the high sliding speed, but the diffusion of Si element keeps almost constant at different sliding speeds.  相似文献   

环状光束辐照下光学薄膜基底温度场有限元分析     

江腾蛟 《嘉应学院学报》2011,29(11):36-39

基于热传导方程,利用有限元分析方法,利用MSC.Marc有限元软件建立了激光辐照下光学薄膜基底温度场的三维模型,研究了光学薄膜基底在环状光束辐照下的温度场分布,并进行了分析.  相似文献   

电气化铁路接触网绝缘性能的实践研究     

李丽红  石白云 《雁北师范学院学报》2011,27(3)

结合同煤集团四台沟电气化铁路110 kv牵引变电所及接触网供电设备故障跳闸率对煤矿电气化铁路定量装车点的接触网设备结构及污染情况进行了系统分析,研究出了提高重污区接触网设备绝缘性能的技改方法,并附注实践取得了良好的效果。  相似文献